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Monitoring of the molecular structure of lubricant oil using a FT-Raman spectrometer prototype

  • The determination of the physical state of the lubricant materials in complex mechanical systems is highly critical from different points of view: operative, economical, environmental, etc. Furthermore, there are several parameters that a lubricant oil must meet for a proper performance inside a machine. The monitoring of these lubricants can represent a serious issue depending on the analyticalThe determination of the physical state of the lubricant materials in complex mechanical systems is highly critical from different points of view: operative, economical, environmental, etc. Furthermore, there are several parameters that a lubricant oil must meet for a proper performance inside a machine. The monitoring of these lubricants can represent a serious issue depending on the analytical approach applied. The molecular change of aging lubricant oils have been analyzed using an all-standard-components and self-designed FT-Raman spectrometer. This analytical tool allows the direct and clean study of the vibrational changes in the molecular structure of the oils without having direct contact with the samples and without extracting the sample from the machine in operation. The FT-Raman spectrometer prototype used in the analysis of the oil samples consist of a Michelson interferometer and a self-designed photon counter cooled down on a Peltier element arrangement. The light coupling has been accomplished by using a conventional 62.5/125μm multi-mode fiber coupler. The FT-Raman arrangement has been able to extract high resolution and frequency precise Raman spectra, comparable to those obtained with commercial FT-Raman systems, from the lubricant oil samples analyzed. The spectral information has helped to determine certain molecular changes in the initial phases of wearing of the oil samples. The proposed instrument prototype has no additional complex hardware components or costly software modules. The mechanical and thermal irregularities influencing the FT-Raman spectrometer have been removed mathematically by accurately evaluating the optical path difference of the Michelson interferometer. This has been achieved by producing an additional interference pattern signal with a λ= 632.8 nm helium-neon laser, which differs from the conventional zero-crossing sampling (also known as Connes advantage) commonly used by FT-devices. It enables the FT-Raman system to perform reliable and clean spectral measurements from the analyzed oil samples.show moreshow less

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Metadaten
Document Type:Conference Proceeding
Conference Type:Konferenzartikel
Zitierlink: https://opus.hs-offenburg.de/7031
Bibliografische Angaben
Title (English):Monitoring of the molecular structure of lubricant oil using a FT-Raman spectrometer prototype
Conference:SPIE Photonics Europe, 13-17 April 2014, Brussels, Belgium
Author:Valentin Ortega ClaveroStaff MemberGND, Andreas WeberStaff Member, Werner SchröderStaff MemberGND, Dan CurticapeanStaff MemberGND, Nicolas Javahiraly, Patrick L. Meyrueis
Year of Publication:2014
Creating Corporation:Society of Photo-Optical Instrumentation Engineers
Place of publication:Bellingham, Washington
Publisher:SPIE
Article Number:91411W
Parent Title (English):Proceedings of SPIE: Optical Sensing and Detection III
Editor:Francis Berghmans, Anna G. Mignani, Piet De Moor
Volume:9141
ISBN:9781628410891
ISSN:0277-786X
DOI:https://doi.org/10.1117/12.2051617
Language:English
Inhaltliche Informationen
Institutes:Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019)
Fakultät Medien und Informationswesen (M+I) (bis 21.04.2021)
Institutes:Bibliografie
Formale Angaben
Open Access: Closed 
Licence (German):License LogoUrheberrechtlich geschützt